Energy and exergy analysis of the drying of corn grains
| Autor: | André Guimarães Ferreira, Cristiana Brasil Maia, Gisele Mol da Silva, Rogério Morouço Coutinho |
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| Rok vydání: | 2021 |
| Předmět: |
Ability to work
Exergy Solar dryer Thermal efficiency 060102 archaeology Renewable Energy Sustainability and the Environment 020209 energy Photovoltaic system Airflow Environmental engineering 06 humanities and the arts 02 engineering and technology 0202 electrical engineering electronic engineering information engineering Exergy efficiency Environmental science 0601 history and archaeology Water content |
| Zdroj: | Renewable Energy. 163:1942-1950 |
| ISSN: | 0960-1481 |
| DOI: | 10.1016/j.renene.2020.10.116 |
| Popis: | A mixed cabin solar dryer was designed and tested in Brazil in the spring equinox, for the drying of corn grains. The key advantage of the current design is its ability to work even in locations with no electricity because a photovoltaic module is used to power an electrical heater and fans. The analysis of the drying process was performed based on the first and second laws of thermodynamics. For average solar radiation and ambient temperature of 710 W/m2 and 30 °C, respectively, the average thermal efficiency obtained was 21% and the exergy efficiency ranged between 10% and 66%, with an average value of 23%. It was observed that the corn grains reached the desired moisture content of 13% in 8.5 h, while a similar sample subjected to natural sun drying failed to reach this moisture content in 24 h. The PV module was also used to preheat the drying air, allowing an average increase in the airflow temperature of 14 °C, reaching a maximum of 27 °C. |
| Databáze: | OpenAIRE |
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